UCLA School of Medicine, 1989
Majalah, Jurnal, Buletin
Severinghaus, Aura E., author
McGraw-Hill , 1953
Buku Teks
Fine, Benjamin, author
Barron's Educational Series, 1966
Buku Referensi
Williams & Willkins, 1989
Buku Teks
American Council on Education, 1964
Buku Teks